/Engine/Source/Runtime/CoreUObject/Public/UObject/CoreRedirects.h
Adds the given combination of (Type, ObjectName, Channel) as a missing name; IsKnownMissing queries will now find it
static bool AddKnownMissing ( ECoreRedirectFlags Type, const [FCoreRedirectObjectName](API\Runtime\CoreUObject\UObject\FCoreRedirectObjectName) & ObjectName, ECoreRedirectFlags Channel )